Home > Locations > Rapid City, SD Rapid City, SD Location Information 2431 Emerson Ln., Ste. 100 Rapid City, SD 57701-5046 Get directions Phone: (605) 399-2998 Fax: (605) 342-2998 ServiceAvailable onsite with appointment EvaluationAvailable onsite with appointment Normal Business Hours Monday - Friday 9:00 am to 12:00 pm 1:00 pm to 4:00 pm After-Hours (Phone Support) Mon-Fri 5:00 pm - 12 am (EST) Sat-Sun 10:00 am - 7:00 pm (EST) (800) 500-9150 Log into myNumotion app to live chat, check your order status, or pay your invoice.